Since the military left Bungenäs in 2000 the bunker 104 had been abandoned, sealed and covered. The bunker was four stories deep and completely underground. In 2013, Skälsö Arkitekter was commissioned by a private client to put the bunker in order, transform it into a place to live and build an extension, a fifth floor, above ground.
The first year of the project was spent on emptying the bunker and inventorying the structure. The extension follows the shape and character of the plan that lay below; cast-in-situ concrete with board formwork, a heavy volume where wall and roof are parts of one solid piece. The existing bunker’s loopholes, several decimeters wide, were pulled up to become vertical openings that run from floor to ceiling.